Commander Sue Williams said charges and cautions were up 24% from March 9, when people with coronavirus symptoms were asked to self-isolate, compared to last year.
She said domestic incidents, which can include family rows not recorded as crimes, were up 3% year on year and 9% between March 9 and April 19, although offences were up just 2% in the Covid-19 period.
There have been two domestic-related murders recorded in London as police continue to warn of an increased risk of abuse during the coronavirus lockdown.
Commander Williams said police officers were finding it "much easier" to arrest suspects, who are either at home during the coronavirus lockdown or with family members or friends.
She added success stories included a pregnant woman in east London who called police for help.>Officers used body-worn cameras to record the allegation and the alleged offender has been remanded in custody after the CPS launched a victimless prosecution, she said.
